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Ngauruhoe Volcano, Tongariro - John Seach
North Island, New Zealand
39.13 S, 175.642 E
summit elevation 1978 m
Stratovolcanoes
Ngauruhoe is the main active vent at Tongariro volcanic complex. Tongariro is a complex of craters that have erupted at different times. It is located 17 km NNE of Ruapehu, and about 260 km SSE of Auckland.
Eruptions at Ngauruhoe have rarely been more than nine years apart.
The volcano has been quiet since 1975 – the longest break in activity in its recorded history. In 1975 an eruption produced pyroclastic flows and a 10km high ash plume.
2006 Earthquakes
Ngauruhoe was raised to level 1 alert in June 2006 due to an increase in earthquakes under the volcano. Earthquakes peaked in early June at about 50/day. The location of the earthquakes were about 1 km beneath the N flank. Temperature and gas emission from the summit remained unchanged. The maximum fumarole temperature near the summit was about 85°C.
Ngauruhoe Volcano Eruptions
1975-77, 1972, 1968-69, 1962, 1958-59, 1956, 1948-54, 1939-40, 1937, 1934, 1931, 1924-28, 1917, 1913-14, 1909-10, 1904-07, 1896-98, 1892, 1890, 1885-86, 1883, 1881, 1878, 1875, 1869-70, 1862-64, 1859, 1857, 1855, 1844, 1841, 1839.